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Conference Paper

A statistical analysis of topological features that impact the eruptivity of solar flares

Authors

Barnes,  Graham
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

DeRosa,  Marc
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Jones,  Shaela
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Arge,  Nick
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Henney,  Carl
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Cheung,  Mark
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Barnes, G., DeRosa, M., Jones, S., Arge, N., Henney, C., Cheung, M. (2023): A statistical analysis of topological features that impact the eruptivity of solar flares, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4550


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020960
Abstract
The topology of the coronal magnetic field plays a key role in determining whether a solar reconnection event will result in an eruption, either by influencing the location of magnetic reconnection, or by determining the access to open magnetic flux that allows an eruption to proceed out into the heliosphere as a CME. Recent modeling efforts have succeeded in producing eruptions using a variety of onset mechanisms, but the question that remains is which of these actually trigger eruptions on the Sun? Using SDO/HMI data and a potential field source surface model, we will present statistical results showing whether the presence of certain topological features is favorable to the occurrence of an eruption should a flare occur. We interpret these results in terms of the cause of eruptions, either in the context of the type of reconnection generating the event (e.g., whether coronal null points are most strongly associated with eruptions, as in the breakout model), or in the context of understanding why some flares lead to eruptions but others don't (e.g., whether access to open magnetic flux facilitates an eruption).